includes/GlobalFunctions.php

   1 <?
   2 # Global functions used everywhere
   3
   4 $wgNumberOfArticles = -1; # Unset
   5 $wgTotalViews = -1;
   6 $wgTotalEdits = -1;
   7
   8 global $IP;
   9 include_once( "$IP/DatabaseFunctions.php" );
  10 include_once( "$IP/UpdateClasses.php" );
  11 include_once( "$IP/LogPage.php" );
  12
  13 # PHP 4.1+ has array_key_exists, PHP 4.0.6 has key_exists instead, and earlier
  14 # versions of PHP have neither. So we roll our own. Note that this
  15 # function will return false even for keys that exist but whose associated
  16 # value is NULL.
  17 #
  18 if ( phpversion() == "4.0.6" ) {
  19         function array_key_exists( $k, $a ) {
  20                 return key_exists( $k, $a );
  21         }
  22 } else if (phpversion() < "4.1") {
  23         function array_key_exists( $k, $a ) {
  24                 return isset($a[$k]);
  25         }
  26 }
  27
  28 if( !function_exists('iconv') ) {
  29         # Assume will only ever use utf-8 and iso-8859-1.
  30         # This will *not* work in all circumstances.
  31         function iconv( $from, $to, $string ) {
  32                 if(strcasecmp( $from, $to ) == 0) return $string;
  33                 if(strcasecmp( $from, "utf-8" ) == 0) return utf8_decode( $string );
  34                 if(strcasecmp( $to, "utf-8" ) == 0) return utf8_encode( $string );
  35                 return $string;
  36         }
  37 }
  38
  39 if( !function_exists('file_get_contents') ) {
  40         # Exists in PHP 4.3.0+
  41         function file_get_contents( $filename ) {
  42                 return implode( "", file( $filename ) );
  43         }
  44 }
  45
  46 $wgRandomSeeded = false;
  47
  48 function wfSeedRandom()
  49 {
  50         global $wgRandomSeeded;
  51
  52         if ( ! $wgRandomSeeded ) {
  53                 $seed = hexdec(substr(md5(microtime()),-8)) & 0x7fffffff;
  54                 mt_srand( $seed );
  55                 $wgRandomSeeded = true;
  56         }
  57 }
  58
  59 function wfLocalUrl( $a, $q = "" )
  60 {
  61         global $wgServer, $wgScript, $wgArticlePath;
  62
  63         $a = str_replace( " ", "_", $a );
  64         #$a = wfUrlencode( $a ); # This stuff is _already_ URL-encoded.
  65
  66         if ( "" == $a ) {
  67                 if( "" == $q ) {
  68                         $a = $wgScript;
  69                 } else {
  70                         $a = "{$wgScript}?{$q}";
  71                 }
  72         } else if ( "" == $q ) {
  73                 $a = str_replace( "$1", $a, $wgArticlePath );
  74         } else {
  75                 $a = "{$wgScript}?title={$a}&{$q}";
  76         }
  77         return $a;
  78 }
  79
  80 function wfLocalUrlE( $a, $q = "" )
  81 {
  82         return wfEscapeHTML( wfLocalUrl( $a, $q ) );
  83 }
  84
  85 function wfFullUrl( $a, $q = "" ) {
  86         global $wgServer;
  87         return $wgServer . wfLocalUrl( $a, $q );
  88 }
  89
  90 function wfFullUrlE( $a, $q = "" ) {
  91         return wfEscapeHTML( wfFullUrl( $a, $q ) );
  92 }
  93
  94 function wfImageUrl( $img )
  95 {
  96         global $wgUploadPath;
  97
  98         $nt = Title::newFromText( $img );
  99         if( !$nt ) return "";
 100
 101         $name = $nt->getDBkey();
 102         $hash = md5( $name );
 103
 104         $url = "{$wgUploadPath}/" . $hash{0} . "/" .
 105           substr( $hash, 0, 2 ) . "/{$name}";
 106         return wfUrlencode( $url );
 107 }
 108
 109 function wfImageArchiveUrl( $name )
 110 {
 111         global $wgUploadPath;
 112
 113         $hash = md5( substr( $name, 15) );
 114         $url = "{$wgUploadPath}/archive/" . $hash{0} . "/" .
 115           substr( $hash, 0, 2 ) . "/{$name}";
 116         return $url;
 117 }
 118
 119 function wfUrlencode ( $s )
 120 {
 121         $ulink = urlencode( $s );
 122         $ulink = preg_replace( "/%3[Aa]/", ":", $ulink );
 123         $ulink = preg_replace( "/%2[Ff]/", "/", $ulink );
 124         return $ulink;
 125 }
 126
 127 function wfUtf8Sequence($codepoint) {
 128         if($codepoint <     0x80) return chr($codepoint);
 129         if($codepoint <    0x800) return chr($codepoint >>  6 & 0x3f | 0xc0) .
 130                                      chr($codepoint       & 0x3f | 0x80);
 131     if($codepoint <  0x10000) return chr($codepoint >> 12 & 0x0f | 0xe0) .
 132                                      chr($codepoint >>  6 & 0x3f | 0x80) .
 133                                      chr($codepoint       & 0x3f | 0x80);
 134         if($codepoint < 0x100000) return chr($codepoint >> 18 & 0x07 | 0xf0) . # Double-check this
 135                                          chr($codepoint >> 12 & 0x3f | 0x80) .
 136                                      chr($codepoint >>  6 & 0x3f | 0x80) .
 137                                      chr($codepoint       & 0x3f | 0x80);
 138         # Doesn't yet handle outside the BMP
 139         return "&#$codepoint;";
 140 }
 141
 142 function wfMungeToUtf8($string) {
 143         global $wgInputEncoding; # This is debatable
 144         #$string = iconv($wgInputEncoding, "UTF-8", $string);
 145         $string = preg_replace ( '/&#([0-9]+);/e', 'wfUtf8Sequence($1)', $string );
 146         $string = preg_replace ( '/&#x([0-9a-f]+);/ie', 'wfUtf8Sequence(0x$1)', $string );
 147         # Should also do named entities here
 148         return $string;
 149 }
 150
 151 function wfDebug( $text, $logonly = false )
 152 {
 153         global $wgOut, $wgDebugLogFile, $wgDebugComments, $wgProfileOnly;
 154
 155         if ( $wgDebugComments && !$logonly ) {
 156                 $wgOut->debug( $text );
 157         }
 158         if ( "" != $wgDebugLogFile && !$wgProfileOnly ) {
 159                 error_log( $text, 3, $wgDebugLogFile );
 160         }
 161 }
 162
 163 function wfReadOnly()
 164 {
 165         global $wgReadOnlyFile;
 166
 167         if ( "" == $wgReadOnlyFile ) { return false; }
 168         return is_file( $wgReadOnlyFile );
 169 }
 170
 171 $wgReplacementKeys = array( "$1", "$2", "$3", "$4", "$5", "$6", "$7", "$8", "$9" );
 172
 173 # Get a message from anywhere
 174 function wfMsg( $key ) {
 175         $args = func_get_args();
 176         if ( count( $args ) ) {
 177                 array_shift( $args );
 178         }
 179         return wfMsgReal( $key, $args, true );
 180 }
 181
 182 # Get a message from the language file
 183 function wfMsgNoDB( $key ) {
 184         $args = func_get_args();
 185         if ( count( $args ) ) {
 186                 array_shift( $args );
 187         }
 188         return wfMsgReal( $key, $args, false );
 189 }
 190
 191 # Really get a message
 192 function wfMsgReal( $key, $args, $useDB ) {
 193         global $wgLang, $wgReplacementKeys, $wgMemc, $wgDBname;
 194         global $wgUseDatabaseMessages, $wgUseMemCached, $wgOut;
 195         global $wgAllMessagesEn, $wgLanguageCode;
 196
 197         $fname = "wfMsg";
 198         wfProfileIn( $fname );
 199
 200         static $messageCache = false;
 201         $memcKey = "$wgDBname:messages";
 202         $fname = "wfMsg";
 203         $message = false;
 204
 205         # newFromText is too slow!
 206         $title = ucfirst( $key );
 207         if ( $messageCache ) {
 208                 $message = $messageCache[$title];
 209         } elseif ( !$wgUseDatabaseMessages || !$useDB ) {
 210                 $message = $wgLang->getMessage( $key );
 211         }
 212
 213         if ( !$message && $wgUseMemCached ) {
 214                 # Try memcached
 215                 if ( !$messageCache ) {
 216                         $messageCache = $wgMemc->get( $memcKey );
 217                 }
 218
 219                 # If there's nothing in memcached, load all the messages from the database
 220                 # This should only happen on server reset -- ordinary changes should update
 221                 # memcached in editUpdates()
 222                 if ( !$messageCache ) {
 223                         # Other threads don't need to load the messages if another thread is doing it.
 224                         $wgMemc->set( $memcKey, "loading", time() + 60 );
 225                         $messageCache = wfLoadAllMessages();
 226                         # Save in memcached
 227                         $wgMemc->set( $memcKey, $messageCache, time() + 3600 );
 228
 229
 230                 }
 231                 if ( is_array( $messageCache ) && array_key_exists( $title, $messageCache ) ) {
 232                         $message = $messageCache[$title];
 233                 }
 234         }
 235
 236         # If there was no MemCached, load each message from the DB individually
 237         if ( !$message ) {
 238                 if ( $useDB ) {
 239                         $sql = "SELECT cur_text FROM cur WHERE cur_namespace=" . NS_MEDIAWIKI .
 240                                 " AND cur_title='$title'";
 241                         $res = wfQuery( $sql, DB_READ, $fname );
 242
 243                         if ( wfNumRows( $res ) ) {
 244                                 $obj = wfFetchObject( $res );
 245                                 $message = $obj->cur_text;
 246                                 wfFreeResult( $res );
 247                         }
 248                 }
 249         }
 250
 251         # Try the array in $wgLang
 252         if ( !$message ) {
 253                 $message = $wgLang->getMessage( $key );
 254         }
 255
 256         # Try the English array
 257         if ( !$message && $wgLanguageCode != "en" ) {
 258                 $message = Language::getMessage( $key );
 259         }
 260
 261         # Replace arguments
 262         if( count( $args ) ) {
 263                 $message = str_replace( $wgReplacementKeys, $args, $message );
 264         }
 265         wfProfileOut( $fname );
 266         if ( !$message ) {
 267                 # Failed, message does not exist
 268                 return "&lt;$key&gt;";
 269         }
 270         return $message;
 271 }
 272
 273 function wfCleanFormFields( $fields )
 274 {
 275         global $HTTP_POST_VARS;
 276         global $wgInputEncoding, $wgOutputEncoding, $wgEditEncoding, $wgLang;
 277
 278         if ( get_magic_quotes_gpc() ) {
 279                 foreach ( $fields as $fname ) {
 280                         if ( isset( $HTTP_POST_VARS[$fname] ) ) {
 281                                 $HTTP_POST_VARS[$fname] = stripslashes(
 282                                   $HTTP_POST_VARS[$fname] );
 283                         }
 284                         global ${$fname};
 285                         if ( isset( ${$fname} ) ) {
 286                                 ${$fname} = stripslashes( ${$fname} );
 287                         }
 288                 }
 289         }
 290         $enc = $wgOutputEncoding;
 291         if( $wgEditEncoding != "") $enc = $wgEditEncoding;
 292         if ( $enc != $wgInputEncoding ) {
 293                 foreach ( $fields as $fname ) {
 294                         if ( isset( $HTTP_POST_VARS[$fname] ) ) {
 295                                 $HTTP_POST_VARS[$fname] = $wgLang->iconv(
 296                                   $wgOutputEncoding, $wgInputEncoding,
 297                                   $HTTP_POST_VARS[$fname] );
 298                         }
 299                         global ${$fname};
 300                         if ( isset( ${$fname} ) ) {
 301                                 ${$fname} = $wgLang->iconv(
 302                                   $enc, $wgInputEncoding, ${$fname} );
 303                         }
 304                 }
 305         }
 306 }
 307
 308 function wfMungeQuotes( $in )
 309 {
 310         $out = str_replace( "%", "%25", $in );
 311         $out = str_replace( "'", "%27", $out );
 312         $out = str_replace( "\"", "%22", $out );
 313         return $out;
 314 }
 315
 316 function wfDemungeQuotes( $in )
 317 {
 318         $out = str_replace( "%22", "\"", $in );
 319         $out = str_replace( "%27", "'", $out );
 320         $out = str_replace( "%25", "%", $out );
 321         return $out;
 322 }
 323
 324 function wfCleanQueryVar( $var )
 325 {
 326         global $wgLang;
 327         if ( get_magic_quotes_gpc() ) {
 328                 $var = stripslashes( $var );
 329         }
 330         return $wgLang->recodeInput( $var );
 331 }
 332
 333 function wfSpecialPage()
 334 {
 335         global $wgUser, $wgOut, $wgTitle, $wgLang;
 336
 337         /* FIXME: this list probably shouldn't be language-specific, per se */
 338         $validSP = $wgLang->getValidSpecialPages();
 339         $sysopSP = $wgLang->getSysopSpecialPages();
 340         $devSP = $wgLang->getDeveloperSpecialPages();
 341
 342         $wgOut->setArticleFlag( false );
 343         $wgOut->setRobotpolicy( "noindex,follow" );
 344
 345         $par = NULL;
 346         list($t, $par) = split( "/", $wgTitle->getDBkey(), 2 );
 347
 348         if ( array_key_exists( $t, $validSP ) ||
 349           ( $wgUser->isSysop() && array_key_exists( $t, $sysopSP ) ) ||
 350           ( $wgUser->isDeveloper() && array_key_exists( $t, $devSP ) ) ) {
 351                 if($par !== NULL)
 352                         $wgTitle = Title::makeTitle( Namespace::getSpecial(), $t );
 353
 354                 $wgOut->setPageTitle( wfMsg( strtolower( $wgTitle->getText() ) ) );
 355
 356                 $inc = "Special" . $t . ".php";
 357                 include_once( $inc );
 358                 $call = "wfSpecial" . $t;
 359                 $call( $par );
 360         } else if ( array_key_exists( $t, $sysopSP ) ) {
 361                 $wgOut->sysopRequired();
 362         } else if ( array_key_exists( $t, $devSP ) ) {
 363                 $wgOut->developerRequired();
 364         } else {
 365                 $wgOut->errorpage( "nosuchspecialpage", "nospecialpagetext" );
 366         }
 367 }
 368
 369 function wfSearch( $s )
 370 {
 371         $se = new SearchEngine( wfCleanQueryVar( $s ) );
 372         $se->showResults();
 373 }
 374
 375 function wfGo( $s )
 376 { # pick the nearest match
 377         $se = new SearchEngine( wfCleanQueryVar( $s ) );
 378         $se->goResult();
 379 }
 380
 381 function wfNumberOfArticles()
 382 {
 383         global $wgNumberOfArticles;
 384
 385         wfLoadSiteStats();
 386         return $wgNumberOfArticles;
 387 }
 388
 389 /* private */ function wfLoadSiteStats()
 390 {
 391         global $wgNumberOfArticles, $wgTotalViews, $wgTotalEdits;
 392         if ( -1 != $wgNumberOfArticles ) return;
 393
 394         $sql = "SELECT ss_total_views, ss_total_edits, ss_good_articles " .
 395           "FROM site_stats WHERE ss_row_id=1";
 396         $res = wfQuery( $sql, DB_READ, "wfLoadSiteStats" );
 397
 398         if ( 0 == wfNumRows( $res ) ) { return; }
 399         else {
 400                 $s = wfFetchObject( $res );
 401                 $wgTotalViews = $s->ss_total_views;
 402                 $wgTotalEdits = $s->ss_total_edits;
 403                 $wgNumberOfArticles = $s->ss_good_articles;
 404         }
 405 }
 406
 407 function wfEscapeHTML( $in )
 408 {
 409         return str_replace(
 410                 array( "&", "\"", ">", "<" ),
 411                 array( "&amp;", "&quot;", "&gt;", "&lt;" ),
 412                 $in );
 413 }
 414
 415 function wfEscapeHTMLTagsOnly( $in ) {
 416         return str_replace(
 417                 array( "\"", ">", "<" ),
 418                 array( "&quot;", "&gt;", "&lt;" ),
 419                 $in );
 420 }
 421
 422 function wfUnescapeHTML( $in )
 423 {
 424         $in = str_replace( "&lt;", "<", $in );
 425         $in = str_replace( "&gt;", ">", $in );
 426         $in = str_replace( "&quot;", "\"", $in );
 427         $in = str_replace( "&amp;", "&", $in );
 428         return $in;
 429 }
 430
 431 function wfImageDir( $fname )
 432 {
 433         global $wgUploadDirectory;
 434
 435         $hash = md5( $fname );
 436         $oldumask = umask(0);
 437         $dest = $wgUploadDirectory . "/" . $hash{0};
 438         if ( ! is_dir( $dest ) ) { mkdir( $dest, 0777 ); }
 439         $dest .= "/" . substr( $hash, 0, 2 );
 440         if ( ! is_dir( $dest ) ) { mkdir( $dest, 0777 ); }
 441
 442         umask( $oldumask );
 443         return $dest;
 444 }
 445
 446 function wfImageArchiveDir( $fname )
 447 {
 448         global $wgUploadDirectory;
 449
 450         $hash = md5( $fname );
 451         $oldumask = umask(0);
 452         $archive = "{$wgUploadDirectory}/archive";
 453         if ( ! is_dir( $archive ) ) { mkdir( $archive, 0777 ); }
 454         $archive .= "/" . $hash{0};
 455         if ( ! is_dir( $archive ) ) { mkdir( $archive, 0777 ); }
 456         $archive .= "/" . substr( $hash, 0, 2 );
 457         if ( ! is_dir( $archive ) ) { mkdir( $archive, 0777 ); }
 458
 459         umask( $oldumask );
 460         return $archive;
 461 }
 462
 463 function wfRecordUpload( $name, $oldver, $size, $desc )
 464 {
 465         global $wgUser, $wgLang, $wgTitle, $wgOut, $wgDeferredUpdateList;
 466         global $wgUseCopyrightUpload , $wpUploadCopyStatus , $wpUploadSource ;
 467
 468         $fname = "wfRecordUpload";
 469
 470         $sql = "SELECT img_name,img_size,img_timestamp,img_description,img_user," .
 471           "img_user_text FROM image WHERE img_name='" . wfStrencode( $name ) . "'";
 472         $res = wfQuery( $sql, DB_READ, $fname );
 473
 474         $now = wfTimestampNow();
 475         $won = wfInvertTimestamp( $now );
 476         $size = IntVal( $size );
 477
 478         if ( $wgUseCopyrightUpload )
 479           {
 480             $textdesc = "== " . wfMsg ( "filedesc" ) . " ==\n" . $desc . "\n" .
 481               "== " . wfMsg ( "filestatus" ) . " ==\n" . $wpUploadCopyStatus . "\n" .
 482               "== " . wfMsg ( "filesource" ) . " ==\n" . $wpUploadSource ;
 483           }
 484         else $textdesc = $desc ;
 485
 486         $now = wfTimestampNow();
 487         $won = wfInvertTimestamp( $now );
 488
 489         if ( 0 == wfNumRows( $res ) ) {
 490                 $sql = "INSERT INTO image (img_name,img_size,img_timestamp," .
 491                   "img_description,img_user,img_user_text) VALUES ('" .
 492                   wfStrencode( $name ) . "',$size,'{$now}','" .
 493                   wfStrencode( $desc ) . "', '" . $wgUser->getID() .
 494                   "', '" . wfStrencode( $wgUser->getName() ) . "')";
 495                 wfQuery( $sql, DB_WRITE, $fname );
 496
 497                 $sql = "SELECT cur_id,cur_text FROM cur WHERE cur_namespace=" .
 498                   Namespace::getImage() . " AND cur_title='" .
 499                   wfStrencode( $name ) . "'";
 500                 $res = wfQuery( $sql, DB_READ, $fname );
 501                 if ( 0 == wfNumRows( $res ) ) {
 502             $common =
 503                           Namespace::getImage() . ",'" .
 504                           wfStrencode( $name ) . "','" .
 505                           wfStrencode( $desc ) . "','" . $wgUser->getID() . "','" .
 506                           wfStrencode( $wgUser->getName() ) . "','" . $now .
 507                           "',1";
 508                         $sql = "INSERT INTO cur (cur_namespace,cur_title," .
 509                           "cur_comment,cur_user,cur_user_text,cur_timestamp,cur_is_new," .
 510                           "cur_text,inverse_timestamp,cur_touched) VALUES (" .
 511                           $common .
 512                           ",'" . wfStrencode( $textdesc ) . "','{$won}','{$now}')";
 513                         wfQuery( $sql, DB_WRITE, $fname );
 514                         $id = wfInsertId() or 0; # We should throw an error instead
 515                         $sql = "INSERT INTO recentchanges (rc_namespace,rc_title,
 516                                 rc_comment,rc_user,rc_user_text,rc_timestamp,rc_new,
 517                                 rc_cur_id,rc_cur_time) VALUES ({$common},{$id},'{$now}')";
 518             wfQuery( $sql, DB_WRITE, $fname );
 519                         $u = new SearchUpdate( $id, $name, $desc );
 520                         $u->doUpdate();
 521                 }
 522         } else {
 523                 $s = wfFetchObject( $res );
 524
 525                 $sql = "INSERT INTO oldimage (oi_name,oi_archive_name,oi_size," .
 526                   "oi_timestamp,oi_description,oi_user,oi_user_text) VALUES ('" .
 527                   wfStrencode( $s->img_name ) . "','" .
 528                   wfStrencode( $oldver ) .
 529                   "',{$s->img_size},'{$s->img_timestamp}','" .
 530                   wfStrencode( $s->img_description ) . "','" .
 531                   wfStrencode( $s->img_user ) . "','" .
 532                   wfStrencode( $s->img_user_text) . "')";
 533                 wfQuery( $sql, DB_WRITE, $fname );
 534
 535                 $sql = "UPDATE image SET img_size={$size}," .
 536                   "img_timestamp='" . wfTimestampNow() . "',img_user='" .
 537                   $wgUser->getID() . "',img_user_text='" .
 538                   wfStrencode( $wgUser->getName() ) . "', img_description='" .
 539                   wfStrencode( $desc ) . "' WHERE img_name='" .
 540                   wfStrencode( $name ) . "'";
 541                 wfQuery( $sql, DB_WRITE, $fname );
 542
 543                 $sql = "UPDATE cur SET cur_touched='{$now}' WHERE cur_namespace=" .
 544                   Namespace::getImage() . " AND cur_title='" .
 545                   wfStrencode( $name ) . "'";
 546                 wfQuery( $sql, DB_WRITE, $fname );
 547         }
 548
 549         $log = new LogPage( wfMsg( "uploadlogpage" ), wfMsg( "uploadlogpagetext" ) );
 550         $da = wfMsg( "uploadedimage", "[[:" . $wgLang->getNsText(
 551           Namespace::getImage() ) . ":{$name}|{$name}]]" );
 552         $ta = wfMsg( "uploadedimage", $name );
 553         $log->addEntry( $da, $desc, $ta );
 554 }
 555
 556
 557 /* Some generic result counters, pulled out of SearchEngine */
 558
 559 function wfShowingResults( $offset, $limit )
 560 {
 561         return wfMsg( "showingresults", $limit, $offset+1 );
 562 }
 563
 564 function wfShowingResultsNum( $offset, $limit, $num )
 565 {
 566         return wfMsg( "showingresultsnum", $limit, $offset+1, $num );
 567 }
 568
 569 function wfViewPrevNext( $offset, $limit, $link, $query = "" )
 570 {
 571         global $wgUser;
 572         $prev = wfMsg( "prevn", $limit );
 573         $next = wfMsg( "nextn", $limit );
 574
 575         $sk = $wgUser->getSkin();
 576         if ( 0 != $offset ) {
 577                 $po = $offset - $limit;
 578                 if ( $po < 0 ) { $po = 0; }
 579                 $q = "limit={$limit}&offset={$po}";
 580                 if ( "" != $query ) { $q .= "&{$query}"; }
 581                 $plink = "<a href=\"" . wfLocalUrlE( $link, $q ) . "\">{$prev}</a>";
 582         } else { $plink = $prev; }
 583
 584         $no = $offset + $limit;
 585         $q = "limit={$limit}&offset={$no}";
 586         if ( "" != $query ) { $q .= "&{$query}"; }
 587
 588         $nlink = "<a href=\"" . wfLocalUrlE( $link, $q ) . "\">{$next}</a>";
 589         $nums = wfNumLink( $offset, 20, $link , $query ) . " | " .
 590           wfNumLink( $offset, 50, $link, $query ) . " | " .
 591           wfNumLink( $offset, 100, $link, $query ) . " | " .
 592           wfNumLink( $offset, 250, $link, $query ) . " | " .
 593           wfNumLink( $offset, 500, $link, $query );
 594
 595         return wfMsg( "viewprevnext", $plink, $nlink, $nums );
 596 }
 597
 598 function wfNumLink( $offset, $limit, $link, $query = "" )
 599 {
 600         global $wgUser;
 601         if ( "" == $query ) { $q = ""; }
 602         else { $q = "{$query}&"; }
 603         $q .= "limit={$limit}&offset={$offset}";
 604
 605         $s = "<a href=\"" . wfLocalUrlE( $link, $q ) . "\">{$limit}</a>";
 606         return $s;
 607 }
 608
 609 function wfClientAcceptsGzip() {
 610         global $wgUseGzip;
 611         if( $wgUseGzip ) {
 612                 # FIXME: we may want to blacklist some broken browsers
 613                 if( preg_match(
 614                         '/\bgzip(?:;(q)=([0-9]+(?:\.[0-9]+)))?\b/',
 615                         $_SERVER["HTTP_ACCEPT_ENCODING"],
 616                         $m ) ) {
 617                         if( ( $m[1] == "q" ) && ( $m[2] == 0 ) ) return false;
 618                         wfDebug( " accepts gzip\n" );
 619                         return true;
 620                 }
 621         }
 622         return false;
 623 }
 624
 625 # Yay, more global functions!
 626 function wfCheckLimits( $deflimit = 50, $optionname = "rclimit" ) {
 627         global $wgUser;
 628
 629         $limit = (int)$_REQUEST['limit'];
 630         if( $limit < 0 ) $limit = 0;
 631         if( ( $limit == 0 ) && ( $optionname != "" ) ) {
 632                 $limit = (int)$wgUser->getOption( $optionname );
 633         }
 634         if( $limit <= 0 ) $limit = $deflimit;
 635         if( $limit > 5000 ) $limit = 5000; # We have *some* limits...
 636
 637         $offset = (int)$_REQUEST['offset'];
 638         $offset = (int)$offset;
 639         if( $offset < 0 ) $offset = 0;
 640         if( $offset > 65000 ) $offset = 65000; # do we need a max? what?
 641
 642         return array( $limit, $offset );
 643 }
 644
 645 # Escapes the given text so that it may be output using addWikiText()
 646 # without any linking, formatting, etc. making its way through. This
 647 # is achieved by substituting certain characters with HTML entities.
 648 # As required by the callers, <nowiki> is not used. It currently does
 649 # not filter out characters which have special meaning only at the
 650 # start of a line, such as "*".
 651 function wfEscapeWikiText( $text )
 652 {
 653         $text = str_replace(
 654                 array( '[',     "'",     'ISBN '    , '://'     , "\n=" ),
 655                 array( '&#91;', '&#39;', 'ISBN&#32;', '&#58;//' , "\n&#61;" ),
 656                 htmlspecialchars($text) );
 657         return $text;
 658 }
 659
 660 # Loads the entire MediaWiki namespace, returns the array
 661 function wfLoadAllMessages()
 662 {
 663         $sql = "SELECT cur_title,cur_text FROM cur WHERE cur_namespace=" . NS_MEDIAWIKI;
 664         $res = wfQuery( $sql, DB_READ, $fname );
 665
 666         $messages = array();
 667         for ( $row = wfFetchObject( $res ); $row; $row = wfFetchObject( $res ) ) {
 668                 $messages[$row->cur_title] = $row->cur_text;
 669         }
 670         wfFreeResult( $res );
 671         return $messages;
 672 }
 673
 674 function wfQuotedPrintable( $string, $charset = "" )
 675 {
 676         # Probably incomplete; see RFC 2045
 677         if( empty( $charset ) ) {
 678                 global $wgInputEncoding;
 679                 $charset = $wgInputEncoding;
 680         }
 681         $charset = strtoupper( $charset );
 682         $charset = str_replace( "ISO-8859", "ISO8859", $charset ); // ?
 683
 684         $illegal = '\x00-\x08\x0b\x0c\x0e-\x1f\x7f-\xff=';
 685         $replace = $illegal . '\t ?_';
 686         if( !preg_match( "/[$illegal]/", $string ) ) return $string;
 687         $out = "=?$charset?Q?";
 688         $out .= preg_replace( "/([$replace])/e", 'sprintf("=%02X",ord("$1"))', $string );
 689         $out .= "?=";
 690         return $out;
 691 }
 692
 693
 694 ?>